diff options
Diffstat (limited to 'include/linux/seq_file.h')
| -rw-r--r-- | include/linux/seq_file.h | 22 |
1 files changed, 19 insertions, 3 deletions
diff --git a/include/linux/seq_file.h b/include/linux/seq_file.h index bd023dd38ae6..234bcdb1fba4 100644 --- a/include/linux/seq_file.h +++ b/include/linux/seq_file.h @@ -207,6 +207,21 @@ static const struct file_operations __name ## _fops = { \ .release = single_release, \ } +#define DEFINE_SHOW_STORE_ATTRIBUTE(__name) \ +static int __name ## _open(struct inode *inode, struct file *file) \ +{ \ + return single_open(file, __name ## _show, inode->i_private); \ +} \ + \ +static const struct file_operations __name ## _fops = { \ + .owner = THIS_MODULE, \ + .open = __name ## _open, \ + .read = seq_read, \ + .write = __name ## _write, \ + .llseek = seq_lseek, \ + .release = single_release, \ +} + #define DEFINE_PROC_SHOW_ATTRIBUTE(__name) \ static int __name ## _open(struct inode *inode, struct file *file) \ { \ @@ -249,18 +264,19 @@ static inline void seq_show_option(struct seq_file *m, const char *name, /** * seq_show_option_n - display mount options with appropriate escapes - * where @value must be a specific length. + * where @value must be a specific length (i.e. + * not NUL-terminated). * @m: the seq_file handle * @name: the mount option name * @value: the mount option name's value, cannot be NULL - * @length: the length of @value to display + * @length: the exact length of @value to display, must be constant expression * * This is a macro since this uses "length" to define the size of the * stack buffer. */ #define seq_show_option_n(m, name, value, length) { \ char val_buf[length + 1]; \ - strncpy(val_buf, value, length); \ + memcpy(val_buf, value, length); \ val_buf[length] = '\0'; \ seq_show_option(m, name, val_buf); \ } |